Caspian Tern Identification

Adult Description

  • Large, gull-like tern.
  • Black cap.
  • Body white.
  • Bill large, thick, and brilliant red with dark tip.

Immature Description

Juvenile has blackish crown, black edging to back feathers.
Relative Size

Relative Sizecrow sizedcrow-sized
Measurements
  • Both Sexes
    • Length: 18.5-21.3 in (47-54 cm)
    • Weight: 18.7-27.6 oz (530-782 g)
    • Wingspan: 47.2-53.1 in (120-135 cm)